Ongoing speciation within the Anastrepha fraterculus cryptic species complex: the case of the Andean morphotype

Francisco Devescovi, Solana Abraham, Alzira K. P. Roriz, Norma Nolazco, Rosario Castaneda, Eduardo Tadeo, Carlos Caceres, Diego F. Segura, M. Teresa Vera, Iara Joachim-Bravo, Nelson Canal, Juan Rull*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

The Anastrepha fraterculus (Wiedemann) (Diptera: Tephritidae) cryptic species complex is currently composed of seven taxonomically recognized morphotypes. Both, pre- and post-zygotic isolation has been documented among four of these morphotypes, revealing that in fact they appear to be distinct biological entities. In order to progress in the full delimitation of species within the complex, we examined reproductive isolation between a Colombian population of the Andean morphotype and populations belonging to four other morphotypes spanning from Mexico to Argentina. Flies from the Andean morphotype exhibited strong pre-zygoticmating isolation through temporal partitioning of mating activity. Post-zygotic isolation was observed for crosses of males of all morphotypes and Andeanmorphotype females, yetmost of the F1 hybrid male F1 hybrid female self-crosses showed normal levels of fertility, a finding suggesting a nuclear-cytoplasmic interaction according to previous studies. Overall, the Andean morphotype within the complex also appears to be a distinct biological entity. We discuss the implications of these findings for the understanding of speciation mechanisms in the Neotropical genus Anastrepha.

Original languageEnglish
Pages (from-to)238-247
Number of pages10
JournalEntomologia Experimentalis et Applicata
Volume152
Issue number3
DOIs
Publication statusPublished - Sep 2014
Externally publishedYes

Keywords

  • pre-zygotic isolation
  • post-zygotic isolation
  • neotropical
  • sterile insect technique
  • SIT
  • Diptera
  • Tephritidae
  • Neotropical
  • Sterile insect technique
  • Post-zygotic isolation
  • Pre-zygotic isolation

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